Introduction
This manual provides essential instructions for the safe and efficient use of your onerbl AC-DC Adapter, model THX-120400KV. This replacement power supply is designed to convert AC power into the DC power required by compatible devices, such as Cristal THX-120400KV, THX-012400KBB, THX012400KBB, and Argos Ltd MK9 2NW mini-fridges (4L and 6L models). Please read this manual thoroughly before use and retain it for future reference.
Safety Information
To ensure safe operation and prevent damage, observe the following precautions:
- Use the adapter only with devices that match its voltage and current specifications. Refer to your device's manual for compatibility.
- Do not expose the adapter to water, moisture, or extreme temperatures.
- Avoid dropping or subjecting the adapter to severe impact.
- Do not attempt to open, modify, or repair the adapter. Refer all servicing to qualified personnel.
- Ensure the power outlet is easily accessible and unplug the adapter during electrical storms or when unused for long periods.
- Keep the adapter away from children.
- Always grasp the plug, not the cord, when disconnecting from the power outlet.
Setup Instructions
Follow these steps to correctly set up your AC-DC adapter:
- Verify Compatibility: Before connecting, confirm that your device requires a 12V DC input and that the adapter's output plug matches your device's input port. This adapter is specifically designed for Cristal THX-120400KV, THX-012400KBB, THX012400KBB, and Argos Ltd MK9 2NW mini-fridges (4L and 6L models).
- Connect to Device: Insert the DC output plug of the onerbl adapter firmly into the power input port of your mini-fridge or compatible device.
- Connect to Power Outlet: Plug the AC input cord of the adapter into a standard AC 100-240V 50/61Hz electrical wall outlet.
- Power On Device: Once connected, you may power on your device according to its own operating instructions.

Image: The onerbl AC-DC Adapter, showing its input and output connections. The adapter is black with a standard AC plug on one end and a DC barrel connector on the other, suitable for mini-fridges.
Operation
The onerbl AC-DC Adapter operates automatically once connected to a power source and a compatible device. It converts the incoming AC voltage to the required DC voltage for your device. The adapter features built-in over-voltage and over-heat protection to safeguard both the adapter and your connected equipment. No user intervention is required during normal operation.
Ensure the adapter is placed in a well-ventilated area to prevent overheating, although it is designed with heat protection. Do not cover the adapter during use.
Maintenance
Proper maintenance ensures the longevity and reliable performance of your adapter:
- Cleaning: Disconnect the adapter from both the power outlet and the device before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or aerosols.
- Storage: When not in use, store the adapter in a cool, dry place, away from direct sunlight and moisture. Avoid tightly winding the cord to prevent damage.
- Inspection: Periodically inspect the adapter and its cables for any signs of damage, such as frayed wires, cracked casing, or bent pins. If damage is observed, discontinue use immediately and replace the adapter.
Troubleshooting
If you encounter issues with your onerbl AC-DC Adapter, refer to the following table for common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on. | Adapter not properly connected. Power outlet not functioning. Device compatibility issue. | Ensure both ends of the adapter are securely plugged in. Test the power outlet with another device. Verify the adapter's specifications match your device's requirements. |
| Adapter feels excessively hot. | Poor ventilation. Overload or internal fault. | Ensure the adapter is in a well-ventilated area and not covered. Disconnect immediately. If the issue persists, replace the adapter. |
| Intermittent power to device. | Loose connection. Damaged cable. | Check all connections for tightness. Inspect the cable for visible damage. If damaged, replace the adapter. |
If troubleshooting steps do not resolve the issue, contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | onerbl |
| Model Number | THX-120400KV |
| Input Voltage | AC 100-240V, 50/61Hz (Worldwide AC Input) |
| Output Voltage/Current | (Specific output details not provided in input, typically 12V DC for compatible mini-fridges) |
| Protection Features | Over Voltage Protection, Over Heat Protection |
| Compatible Devices | Cristal THX-120400KV, THX-012400KBB, THX012400KBB, Argos Ltd MK9 2NW Plug Ideal Mini-Fridges (4L, 6L) |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |
Warranty and Support
This onerbl AC-DC Adapter is covered by a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact your retailer.
For technical support, troubleshooting assistance, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.